EP3655195A1 - Dispositif de découpe par jet de fluide - Google Patents

Dispositif de découpe par jet de fluide

Info

Publication number
EP3655195A1
EP3655195A1 EP18713187.5A EP18713187A EP3655195A1 EP 3655195 A1 EP3655195 A1 EP 3655195A1 EP 18713187 A EP18713187 A EP 18713187A EP 3655195 A1 EP3655195 A1 EP 3655195A1
Authority
EP
European Patent Office
Prior art keywords
fluid jet
fluid
air chamber
cutting device
injector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18713187.5A
Other languages
German (de)
English (en)
Inventor
Bernd Stuke
Malte Bickelhaupt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3655195A1 publication Critical patent/EP3655195A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/08—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape of pulsating nature, e.g. delivering liquid in successive separate quantities ; Fluidic oscillators
    • B05B1/083—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape of pulsating nature, e.g. delivering liquid in successive separate quantities ; Fluidic oscillators the pulsating mechanism comprising movable parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/12—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means capable of producing different kinds of discharge, e.g. either jet or spray
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0483—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with gas and liquid jets intersecting in the mixing chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
    • B24C5/04—Nozzles therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
    • B26F2003/006—Severing by means other than cutting; Apparatus therefor by means of a fluid jet having a shutter or water jet deflector

Definitions

  • the invention relates to a fluid jet cutting device, as used to produce a fluid jet, with the workpieces can be cut, stripped or processed in other ways.
  • a fluid jet cutting device for generating a fluid jet by means of high pressure is known for example from DE 10 2014 225 904 AI.
  • fluid usually water
  • high pressure pump or other device and fed to an injection nozzle.
  • the compressed fluid exits, thereby forming a high-pressure fluid jet whose particles have such a high velocity that can be divided with the high-pressure fluid jet objects.
  • water is used as the fluid, it is called high-pressure water jet cutting. It can be divided up to a certain thickness and very hard objects, such as ceramics or steel.
  • the device is also suitable for stripping of components by the high-pressure fluid jet is directed with suitable pressure, distance and angle to the workpiece to be machined so that the high-pressure fluid jet does not split the workpiece, but for example, removes a lacquer layer from the surface of the workpiece, without to damage this.
  • a nozzle for generating the high-pressure fluid jet is used, which makes it possible to close or release the injection port through which the high-pressure fluid jet emerges by means of a movable element.
  • a pulsed high-pressure fluid jet can be generated.
  • the jet must have different properties.
  • the process parameters can be varied: The distance between the injection nozzle and the workpiece can be changed or the pressure adjusted.
  • the addition of an abrasive medium to the high-pressure fluid is possible, which can also significantly influence the cutting action or stripping effect.
  • the device must allow such a change in the parameters by simple means, since otherwise the fluid jet cutting device must be switched off until the new parameters are set, possibly by replacing individual components, which makes the operation of the device more expensive.
  • the fluid jet cutting device has the advantage that the permeability of the fluid jet generated thereby can be easily regulated in order to modify the fluid jet for various tasks.
  • the fluid jet cutting device for generating a fluid jet to a fluid high pressure source from the compressed via a high-pressure line fluid is fed to an injector, wherein the injector ne nozzle opening, via which the compressed fluid can flow forming a fluid jet.
  • Downstream of the injector is an adapter having a central opening through which the fluid jet can pass.
  • the central opening forms an air chamber, which forms the outlet-side end of the central opening, wherein in the adapter in the region of the air chamber an inlet chamber is formed.
  • Direction for influencing the fluid jet is provided, with which the fluid jet can be expanded.
  • the cutting action of the fluid jet can be modified so that it is less penetrating and more likely to edit the surface of the workpiece, that is, for example, to decoat. But it can also be used to increase the cutting width, which can be particularly advantageous for workpieces that are made of a relatively soft material, depending on the desired cutting performance.
  • the central opening in the section facing the injector forms a flow chamber which directs the fluid jet emerging from the nozzle opening into the air chamber.
  • the flow chamber serves to guide the flow of the fluid jet issuing from the injector or of a plurality of fluid jets, if the injector has a plurality of nozzle openings.
  • the injector has a plurality of nozzle openings, wherein the respectively emerging from the nozzle opening fluid jet is directed through the flow chamber into the air chamber.
  • an injector having a plurality of nozzle openings which may be particularly advantageous for high fluid flow rates.
  • an outlet opening is formed at the transition of the flow chamber into the air chamber, through which the fluid flows and forms a fluid jet on exiting the outlet opening, which then passes through the air chamber.
  • the shape, length and diameter of the outlet opening can also be influenced by the fluid jet.
  • the device for influencing the fluid jet is formed by at least one air inlet, which is formed in the adapter in the air chamber and via which a gas can be introduced into the air chamber, that the fluid jet is expanded.
  • INS it is particularly advantageous if compressed gas is introduced via the air inlet, in particular ambient air at a pressure which is above the ambient pressure.
  • air inlet in particular ambient air at a pressure which is above the ambient pressure.
  • the introduced gas in the air chamber meets directly on the fluid jet.
  • the device for influencing the fluid jet is a deflecting bolt, which can be introduced into the air chamber, so that the deflecting pin is at least partially immersed in the fluid jet and thereby expands it.
  • the fluid jet is more or less influenced and widened accordingly.
  • the deflection bolt is advantageously introduced through a lateral opening in the adapter in the air chamber. This allows, on the one hand, to introduce the deflecting bolt continuously into the fluid jet and, on the other hand, if the fluid jet has removed parts of it, the deflecting bolt can be tracked in order to restore the deflection by the deflecting bolt.
  • the injector of the fluid jet cutting device is provided with an interrupter unit through which the nozzle opening can be opened or closed and the fluid jet can thus be interrupted.
  • an interrupter unit through which the nozzle opening can be opened or closed and the fluid jet can thus be interrupted.
  • FIG. 1 shows a fluid jet cutting device according to the invention in a schematic representation together with the supply device of the fluid
  • FIG. 2 shows a further exemplary embodiment of the fluid jet cutting device according to the invention, wherein essentially only the adapter of a further exemplary embodiment is shown here,
  • FIG. 3 shows another embodiment in the same illustration as
  • FIG. 4 shows a further exemplary embodiment, likewise in the same illustration as FIG. 2.
  • FIG. 1 schematically shows a fluid jet cutting device according to the invention.
  • the fluid which is to be used for fluid jet cutting is held in a fluid tank 1 and conveyed from there via a line 2 to a high-pressure pump 3, which serves as a high-pressure source for the fluid.
  • the compressed fluid is fed via a high pressure line 5 to an injector 4, which has a nozzle body 6, in which a piston-shaped nozzle needle 7 is arranged to be longitudinally displaceable.
  • the nozzle needle 7 is surrounded at its lower end in the drawing by a pressure chamber 20, in which the compressed fluid is introduced, so that the nozzle needle 7 is surrounded by high-pressure fluid.
  • a nozzle seat 8 is formed, with which the nozzle needle 7 cooperates so that when the nozzle needle 7 on the nozzle seat 8 a plurality of nozzle openings 13 which are formed at the end of the nozzle body 6, opposite the pressure chamber 20 are closed. If the nozzle needle 7 moves away from the nozzle seat 8, a connection is established between the pressure chamber 20 and the nozzle openings 13 so that compressed fluid is forced out of the pressure chamber 20 through the nozzle openings 13 and forms fluid jets 27 there. The nozzle needle 7 thus forms an interrupter unit which makes it possible to produce a non-continuous fluid jet 27. To move the nozzle needle 7 within the nozzle body 6, the alternating pressure in a control chamber 10.
  • the control chamber 10 is bounded by a guide body 9 and the nozzle seat 8 facing away from the end of the nozzle needle 7, wherein the nozzle needle 7 leads within the guide body 9 is. Due to the pressure within the control chamber 10, a closing force acting in the direction of the nozzle seat 8 is generated on the nozzle needle 7, wherein in the control chamber 10 due to the inlet throttle 11, which is connected to the high pressure line 5, the same high fluid pressure is present as in the pressure chamber 20th To regulate the pressure in the control chamber 10 is a control valve 15, via the fluid from the control chamber 10 via an outlet throttle 12 and a return line 23 back into the tank 1 can be passed.
  • control valve 15 If the control valve 15 is opened, more fluid flows out of the control chamber 10 via the outlet throttle 12 than flows through the inlet throttle 11 over the same period, so that the pressure in the control chamber 10 decreases. As a result of the fluid pressure in the pressure chamber 20, the nozzle needle 7 is pushed away from the nozzle seat 8 and opens the connection between the pressure chamber 20 and the nozzle openings 13. If the control valve 15 is closed again, the previous high fluid pressure in the control chamber 10 again sets in Nozzle needle 7 slides back into its closed position to the nozzle seat. 8
  • the end of the nozzle body 6, in which the nozzle openings 13 are located, has a frusto-conical outer surface.
  • an adapter 16 sealingly, which has a substantially conical outer contour and forms a matching receptacle 24 for the nozzle body 6.
  • a central opening 17 is formed, which immediately adjacent to the nozzle body 6 forms a flow chamber 18, which merges into an outlet opening 25 and which eventually widens into an air chamber 28. If fluid exits from the nozzle openings 13, as shown in FIG. 1, the fluid jets are deflected by the shape of the flow chamber 18 and are bundled into a single fluid jet that passes through the outlet opening 25.
  • the fluid jet 27 thus formed traverses the air chamber 28 and finally strikes the workpiece 26, which is indicated in the lower region of FIG.
  • the workpiece 26 is divided, the cutting line being produced by the movement of the injector 4 or of the workpiece 26.
  • the fluid jet 27 can also be used for other processing of the workpiece 26, for example, for stripping.
  • one or more air inlets 35 are provided in the region of the air chamber 28. Gas can be introduced via these air inlets 35, which is compressed by a compressor 36 and conducted via a pressure line 37 to the air inlets, ambient air preferably being used as the gas.
  • the air introduced through the air inlets 35 with a suitable pressure influences the fluid jet 27 so that it is widened.
  • the penetration effect of the fluid jet 27 is reduced because the fluid particles now impinge on a larger area of the workpiece 26.
  • the workpiece 26 is not to be cut, but, for example, stripped by a lacquer or a ceramic layer is removed from the workpiece 26, for which generally lower energies are necessary than for cutting the workpiece 26.
  • the expanded fluid jet 27 can also be used to obtain a larger cutting width.
  • the injected air into the air chamber 28 is compressed via the compressor 36 to a pressure above the atmospheric pressure, preferably 2 to 10 bar, wherein on the amount of injected air or the injected gas and the pressure, the effect on the fluid jet 27 can be adjusted can.
  • a pressure above the atmospheric pressure preferably 2 to 10 bar
  • FIG. 2 shows a further embodiment of the injector according to the invention is shown, in which case essentially only the adapter is shown. additionally
  • an abrasive medium in the air chamber 28 here.
  • an appropriate feed 32 which is indicated here as an opening in the wall of the air chamber 28
  • an abrasive medium such as a sand or ceramic particles, are introduced.
  • the abrasive particles mix within the air chamber 28 with the fluid jet 27 and meet with the fluid jet on the workpiece.
  • the air injected into the air chamber 28 can also be used to achieve better mixing of the abrasive particles with the fluid jet.
  • an additive to the high-pressure fluid can be added within the flow chamber 18, for example substances which reduce the corrosive action of the water and thereby permit the cutting of sensitive workpieces.
  • a feed 30 in the form of an opening in the wall of the adapter 16 is provided, via which the additive can be added. It is also possible to simultaneously add both abrasive particles and an additive.
  • a deflection bolt 38 can be introduced into the air chamber 28 via a lateral opening 39.
  • the deflection bolt 38 is made of a hard, resistant material, such as ceramic, and is so far introduced into the air chamber 28 until it at least partially immersed in the fluid jet 27. This results in a widening of the fluid jet 27 and thus to a similar effect as by the injection of air. As in the case of blowing in the air, the fluid jet 27 widens as a result and its cutting action decreases, which can be advantageous in particular for stripping or for deburring.
  • both air is blown into the air chamber 28, and the deflection bolt 38 is inserted, depending on how strong the desired expansion of the fluid jet 27 should be.
  • the deflecting pin 38 can be pushed in at any time or removed from the air chamber 28. Since the front portion of the deflecting pin 38 is hit by the fluid jet 27, this is worn over time and must be nachschoben accordingly to continue to achieve the desired effect.
  • FIG. 4 shows a further exemplary embodiment of the fluid jet cutting device according to the invention.
  • the nozzle body 6 here has only one nozzle opening 13, which is arranged centrally in the nozzle seat 8.
  • the exiting from the nozzle opening 13 fluid jet 27 is no longer diverted here in the central opening 17, but flows through unhindered the first part of the central opening 17 and thus enters the air chamber 28.
  • the fluid jet 27 through through air inlets 35 injected air or through Insertion of a deflecting pin 38 are widened in the manner already described.
  • the flow chamber 18 is omitted in this embodiment; the first part of the central opening 17 serves here only to receive an end region of the nozzle body 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

L'invention concerne un dispositif de découpe par jet de fluide servant à produire un jet de fluide (27) et comprenant une source de fluide haute pression (3) permettant d'alimenter un injecteur (4) en fluide comprimé par l'intermédiaire d'une conduite haute pression (5), l'injecteur (4) présentant un orifice de buse (13) par lequel le fluide comprimé peut sortir en formant le jet de fluide (27). Un adaptateur (16) agencé en aval de l'injecteur (4) présente un orifice central (17) par lequel le jet de fluide (27) peut passer, l'orifice central (17) formant une chambre à air (28) qui forme l'extrémité de l'orifice central (17) côté sortie. Un dispositif (35 ; 38) agissant sur le jet de fluide (27) et permettant d'élargir le jet de fluide (27) est placé dans l'adaptateur (16) dans la zone de la chambre à air (28).
EP18713187.5A 2017-04-11 2018-03-21 Dispositif de découpe par jet de fluide Withdrawn EP3655195A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017206166.9A DE102017206166A1 (de) 2017-04-11 2017-04-11 Fluidstrahlschneidvorrichtung
PCT/EP2018/057101 WO2018188915A1 (fr) 2017-04-11 2018-03-21 Dispositif de découpe par jet de fluide

Publications (1)

Publication Number Publication Date
EP3655195A1 true EP3655195A1 (fr) 2020-05-27

Family

ID=61768291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18713187.5A Withdrawn EP3655195A1 (fr) 2017-04-11 2018-03-21 Dispositif de découpe par jet de fluide

Country Status (3)

Country Link
EP (1) EP3655195A1 (fr)
DE (1) DE102017206166A1 (fr)
WO (1) WO2018188915A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019004685A1 (de) * 2019-06-28 2020-12-31 Technische Universität Chemnitz Verfahren zum Materialabtrag an einer Halbzeugoberfläche
DE102019004686A1 (de) * 2019-06-28 2020-12-31 Technische Universität Chemnitz Verfahren zur Bearbeitung einer Schneidkante eines Zerspanungs- oder Schneidwerkzeuges und Vorichtung zur Durchführung des Verfahrens

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4762277A (en) * 1982-12-06 1988-08-09 Briggs Technology Inc. Apparatus for accelerating slugs of liquid
DE4120613A1 (de) * 1991-06-20 1992-03-05 Suesse Harald Selbstregulierender hochdrucktrennstrahlbeschleuniger
US6280302B1 (en) * 1999-03-24 2001-08-28 Flow International Corporation Method and apparatus for fluid jet formation
EP1657020A1 (fr) * 2004-11-10 2006-05-17 Synova S.A. Méthode et dispositif pour optimiser la cohérence d'un jet de fluide utilisé pour le travail de matériaux et buse pour un tel dispositif
US7559489B2 (en) * 2006-08-23 2009-07-14 Valiant Corporation High-pressure pulse nozzle assembly
EP3020520B1 (fr) * 2014-11-14 2018-01-03 HP Scitex Ltd Traitement par courant-jet d'azote liquide de papier, de cartonnage ou de carton
DE102014225904A1 (de) 2014-12-15 2016-06-16 Robert Bosch Gmbh Verfahren zum Flüssigkeitsstrahlschneiden

Also Published As

Publication number Publication date
WO2018188915A1 (fr) 2018-10-18
DE102017206166A1 (de) 2018-10-11

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